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3 Cards in this Set
- Front
- Back
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Identity Elimination
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1. SameRow(a,a)
2. b=a __ 3. b = b (=Intro) 4. a = b (=Elim 3,2) 5. SameRow (b,a) (=Elim1,4) |
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Distribution
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A ^ (B ∨ C) <=> (A ^ B) ∨ (A ^ C)
A ∨ (B ^ C) <=> (A ∨ B) ^ (A ∨ C) |
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Proof by Contradiction
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For any sentence "¬S", assume "S" and achieve contradiction
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